Chem 210, Exam 5 (Final), Patell Questions & Answers(Graded A+)

What is the difference in the properties of a solid, liquid, or gas reflect the strengths of the attractive forces between the molecules that make up each phase? - ANSWERintermolecular forces What are the examples of intermolecular forces? - ANSWERdispersion, dipole-dipole, hydrogen bonding Dipole-dipole interactions are attractive forces that act between ______ molecules. - ANSWERpolar Polar molecules have permanent dipoles. The positive end of one permanent dipole is attracted to the negative end of another. - ANSWERdipole-dipole force If two molecules have about the same mass and size, then dipole-dipole forces increase with ___________. - ANSWERincreasing polarity Certain physical properties such as boiling point reflect the magnitude of ___________. For molecules of similar mass and size, the stronger the dipole-dipole attraction, the ______ the boiling point because more energy is required to disrupt these attractions. - ANSWERintermolecular forces, higher _______ increases as dipole dipole forces increases. - ANSWERboiling point If a formula only has hydrogen and carbon, it is _______. - ANSWERnon-polar If a formula has hydrogen, carbon and other elements, it is ______. - ANSWERpolar The dipole moment tells you how _____ a compound is. - ANSWERpolar (higher Dipole moment, higher polarity) What is the strongest intermolecular force and is a special type of dipole-dipole interaction? - ANSWERhydrogen bonding Hydrogen bonding only occurs in molecules that contain hydrogen directly bonded to _____, ______, or _______. - ANSWERnitrogen, oxygen, fluorine The presence of __________ creates higher than expected melting points and boiling points. - ANSWERhydrogen bonding Anything with hydrogen bonding has ______ forces. - ANSWERdipole dipole What are the weakest intermolecular force that result from attractions between instantaneous dipoles of nonpolar molecules? - ANSWERdispersion forces Dispersion forces are present in _____ molecules but are the only intermolecular force pr